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From: Paul Burton <paul.burton@imgtec.com>
To: <linux-mips@linux-mips.org>
Cc: Paul Burton <paul.burton@imgtec.com>, Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 4/6] MIPS: Use current_cpu_type() in m4kc_tlbp_war()
Date: Fri, 2 Jun 2017 15:38:04 -0700	[thread overview]
Message-ID: <20170602223806.5078-5-paul.burton@imgtec.com> (raw)
In-Reply-To: <20170602223806.5078-1-paul.burton@imgtec.com>

Use current_cpu_type() to check for 4Kc processors instead of checking
the PRID directly. This will allow for the 4Kc case to be optimised out
of kernels that can't run on 4KC processors, thanks to __get_cpu_type()
and its unreachable() call.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
---

 arch/mips/mm/tlbex.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index e6499209b81c..5aadc69c8ce3 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -153,8 +153,7 @@ static int scratchpad_offset(int i)
  */
 static int m4kc_tlbp_war(void)
 {
-	return (current_cpu_data.processor_id & 0xffff00) ==
-	       (PRID_COMP_MIPS | PRID_IMP_4KC);
+	return current_cpu_type() == CPU_4KC;
 }
 
 /* Handle labels (which must be positive integers). */
-- 
2.13.0

WARNING: multiple messages have this Message-ID (diff)
From: Paul Burton <paul.burton@imgtec.com>
To: linux-mips@linux-mips.org
Cc: Paul Burton <paul.burton@imgtec.com>, Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 4/6] MIPS: Use current_cpu_type() in m4kc_tlbp_war()
Date: Fri, 2 Jun 2017 15:38:04 -0700	[thread overview]
Message-ID: <20170602223806.5078-5-paul.burton@imgtec.com> (raw)
Message-ID: <20170602223804.9nn01eZXlMOWXqO3cvzmsUapjEp_TJPJH1agN10CDZg@z> (raw)
In-Reply-To: <20170602223806.5078-1-paul.burton@imgtec.com>

Use current_cpu_type() to check for 4Kc processors instead of checking
the PRID directly. This will allow for the 4Kc case to be optimised out
of kernels that can't run on 4KC processors, thanks to __get_cpu_type()
and its unreachable() call.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
---

 arch/mips/mm/tlbex.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index e6499209b81c..5aadc69c8ce3 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -153,8 +153,7 @@ static int scratchpad_offset(int i)
  */
 static int m4kc_tlbp_war(void)
 {
-	return (current_cpu_data.processor_id & 0xffff00) ==
-	       (PRID_COMP_MIPS | PRID_IMP_4KC);
+	return current_cpu_type() == CPU_4KC;
 }
 
 /* Handle labels (which must be positive integers). */
-- 
2.13.0

  parent reply	other threads:[~2017-06-02 22:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-02 22:38 [PATCH 0/6] MIPS: TLB exception handler fixes & optimisation Paul Burton
2017-06-02 22:38 ` Paul Burton
2017-06-02 22:38 ` [PATCH 1/6] MIPS: Add CPU shared FTLB feature detection Paul Burton
2017-06-02 22:38   ` Paul Burton
2017-06-02 22:38 ` [PATCH 2/6] MIPS: Handle tlbex-tlbp race condition Paul Burton
2017-06-02 22:38   ` Paul Burton
2017-06-02 22:38 ` [PATCH 3/6] MIPS: Allow storing pgd in C0_CONTEXT for MIPSr6 Paul Burton
2017-06-02 22:38   ` Paul Burton
2017-06-02 22:38 ` Paul Burton [this message]
2017-06-02 22:38   ` [PATCH 4/6] MIPS: Use current_cpu_type() in m4kc_tlbp_war() Paul Burton
2017-06-02 22:38 ` [PATCH 5/6] MIPS: tlbex: Use ErrorEPC as scratch when KScratch isn't available Paul Burton
2017-06-02 22:38   ` Paul Burton
2017-06-15 17:27   ` Maciej W. Rozycki
2017-06-15 17:27     ` Maciej W. Rozycki
2017-06-28 15:25     ` Ralf Baechle
2017-06-29 16:39       ` Maciej W. Rozycki
2017-06-29 16:39         ` Maciej W. Rozycki
2017-06-02 22:38 ` [PATCH 6/6] MIPS: tlbex: Remove struct work_registers Paul Burton
2017-06-02 22:38   ` Paul Burton

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